drivers/block/cciss.h

   1 #ifndef CCISS_H
   2 #define CCISS_H
   3
   4 #include <linux/genhd.h>
   5
   6 #include "cciss_cmd.h"
   7
   8
   9 #define NWD_SHIFT       4
  10 #define MAX_PART        (1 << NWD_SHIFT)
  11
  12 #define IO_OK           0
  13 #define IO_ERROR        1
  14
  15 struct ctlr_info;
  16 typedef struct ctlr_info ctlr_info_t;
  17
  18 struct access_method {
  19         void (*submit_command)(ctlr_info_t *h, CommandList_struct *c);
  20         void (*set_intr_mask)(ctlr_info_t *h, unsigned long val);
  21         unsigned long (*fifo_full)(ctlr_info_t *h);
  22         unsigned long (*intr_pending)(ctlr_info_t *h);
  23         unsigned long (*command_completed)(ctlr_info_t *h);
  24 };
  25 typedef struct _drive_info_struct
  26 {
  27         __u32   LunID;
  28         int     usage_count;
  29         struct request_queue *queue;
  30         sector_t nr_blocks;
  31         int     block_size;
  32         int     heads;
  33         int     sectors;
  34         int     cylinders;
  35         int     raid_level; /* set to -1 to indicate that
  36                              * the drive is not in use/configured
  37                             */
  38         int     busy_configuring; /*This is set when the drive is being removed
  39                                    *to prevent it from being opened or it's queue
  40                                    *from being started.
  41                                   */
  42         __u8 serial_no[16]; /* from inquiry page 0x83, */
  43                             /* not necc. null terminated. */
  44 } drive_info_struct;
  45
  46 #ifdef CONFIG_CISS_SCSI_TAPE
  47
  48 struct sendcmd_reject_list {
  49         int ncompletions;
  50         unsigned long *complete; /* array of NR_CMDS tags */
  51 };
  52
  53 #endif
  54 struct ctlr_info
  55 {
  56         int     ctlr;
  57         char    devname[8];
  58         char    *product_name;
  59         char    firm_ver[4]; // Firmware version
  60         struct pci_dev *pdev;
  61         __u32   board_id;
  62         void __iomem *vaddr;
  63         unsigned long paddr;
  64         int     nr_cmds; /* Number of commands allowed on this controller */
  65         CfgTable_struct __iomem *cfgtable;
  66         int     interrupts_enabled;
  67         int     major;
  68         int     max_commands;
  69         int     commands_outstanding;
  70         int     max_outstanding; /* Debug */
  71         int     num_luns;
  72         int     highest_lun;
  73         int     usage_count;  /* number of opens all all minor devices */
  74 #       define DOORBELL_INT     0
  75 #       define PERF_MODE_INT    1
  76 #       define SIMPLE_MODE_INT  2
  77 #       define MEMQ_MODE_INT    3
  78         unsigned int intr[4];
  79         unsigned int msix_vector;
  80         unsigned int msi_vector;
  81         int     cciss_max_sectors;
  82         BYTE    cciss_read;
  83         BYTE    cciss_write;
  84         BYTE    cciss_read_capacity;
  85
  86         // information about each logical volume
  87         drive_info_struct drv[CISS_MAX_LUN];
  88
  89         struct access_method access;
  90
  91         /* queue and queue Info */
  92         struct hlist_head reqQ;
  93         struct hlist_head cmpQ;
  94         unsigned int Qdepth;
  95         unsigned int maxQsinceinit;
  96         unsigned int maxSG;
  97         spinlock_t lock;
  98
  99         //* pointers to command and error info pool */
 100         CommandList_struct      *cmd_pool;
 101         dma_addr_t              cmd_pool_dhandle;
 102         ErrorInfo_struct        *errinfo_pool;
 103         dma_addr_t              errinfo_pool_dhandle;
 104         unsigned long           *cmd_pool_bits;
 105         int                     nr_allocs;
 106         int                     nr_frees;
 107         int                     busy_configuring;
 108         int                     busy_initializing;
 109
 110         /* This element holds the zero based queue number of the last
 111          * queue to be started.  It is used for fairness.
 112         */
 113         int                     next_to_run;
 114
 115         // Disk structures we need to pass back
 116         struct gendisk   *gendisk[CISS_MAX_LUN];
 117 #ifdef CONFIG_CISS_SCSI_TAPE
 118         void *scsi_ctlr; /* ptr to structure containing scsi related stuff */
 119         /* list of block side commands the scsi error handling sucked up */
 120         /* and saved for later processing */
 121         struct sendcmd_reject_list scsi_rejects;
 122 #endif
 123         unsigned char alive;
 124         struct completion *rescan_wait;
 125         struct task_struct *cciss_scan_thread;
 126 };
 127
 128 /*  Defining the diffent access_menthods */
 129 /*
 130  * Memory mapped FIFO interface (SMART 53xx cards)
 131  */
 132 #define SA5_DOORBELL    0x20
 133 #define SA5_REQUEST_PORT_OFFSET 0x40
 134 #define SA5_REPLY_INTR_MASK_OFFSET      0x34
 135 #define SA5_REPLY_PORT_OFFSET           0x44
 136 #define SA5_INTR_STATUS         0x30
 137 #define SA5_SCRATCHPAD_OFFSET   0xB0
 138
 139 #define SA5_CTCFG_OFFSET        0xB4
 140 #define SA5_CTMEM_OFFSET        0xB8
 141
 142 #define SA5_INTR_OFF            0x08
 143 #define SA5B_INTR_OFF           0x04
 144 #define SA5_INTR_PENDING        0x08
 145 #define SA5B_INTR_PENDING       0x04
 146 #define FIFO_EMPTY              0xffffffff
 147 #define CCISS_FIRMWARE_READY    0xffff0000 /* value in scratchpad register */
 148
 149 #define  CISS_ERROR_BIT         0x02
 150
 151 #define CCISS_INTR_ON   1
 152 #define CCISS_INTR_OFF  0
 153 /*
 154         Send the command to the hardware
 155 */
 156 static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
 157 {
 158 #ifdef CCISS_DEBUG
 159          printk("Sending %x - down to controller\n", c->busaddr );
 160 #endif /* CCISS_DEBUG */
 161          writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
 162          h->commands_outstanding++;
 163          if ( h->commands_outstanding > h->max_outstanding)
 164                 h->max_outstanding = h->commands_outstanding;
 165 }
 166
 167 /*
 168  *  This card is the opposite of the other cards.
 169  *   0 turns interrupts on...
 170  *   0x08 turns them off...
 171  */
 172 static void SA5_intr_mask(ctlr_info_t *h, unsigned long val)
 173 {
 174         if (val)
 175         { /* Turn interrupts on */
 176                 h->interrupts_enabled = 1;
 177                 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 178         } else /* Turn them off */
 179         {
 180                 h->interrupts_enabled = 0;
 181                 writel( SA5_INTR_OFF,
 182                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 183         }
 184 }
 185 /*
 186  *  This card is the opposite of the other cards.
 187  *   0 turns interrupts on...
 188  *   0x04 turns them off...
 189  */
 190 static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val)
 191 {
 192         if (val)
 193         { /* Turn interrupts on */
 194                 h->interrupts_enabled = 1;
 195                 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 196         } else /* Turn them off */
 197         {
 198                 h->interrupts_enabled = 0;
 199                 writel( SA5B_INTR_OFF,
 200                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 201         }
 202 }
 203 /*
 204  *  Returns true if fifo is full.
 205  *
 206  */
 207 static unsigned long SA5_fifo_full(ctlr_info_t *h)
 208 {
 209         if( h->commands_outstanding >= h->max_commands)
 210                 return(1);
 211         else
 212                 return(0);
 213
 214 }
 215 /*
 216  *   returns value read from hardware.
 217  *     returns FIFO_EMPTY if there is nothing to read
 218  */
 219 static unsigned long SA5_completed(ctlr_info_t *h)
 220 {
 221         unsigned long register_value
 222                 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
 223         if(register_value != FIFO_EMPTY)
 224         {
 225                 h->commands_outstanding--;
 226 #ifdef CCISS_DEBUG
 227                 printk("cciss:  Read %lx back from board\n", register_value);
 228 #endif /* CCISS_DEBUG */
 229         }
 230 #ifdef CCISS_DEBUG
 231         else
 232         {
 233                 printk("cciss:  FIFO Empty read\n");
 234         }
 235 #endif
 236         return ( register_value);
 237
 238 }
 239 /*
 240  *      Returns true if an interrupt is pending..
 241  */
 242 static unsigned long SA5_intr_pending(ctlr_info_t *h)
 243 {
 244         unsigned long register_value  =
 245                 readl(h->vaddr + SA5_INTR_STATUS);
 246 #ifdef CCISS_DEBUG
 247         printk("cciss: intr_pending %lx\n", register_value);
 248 #endif  /* CCISS_DEBUG */
 249         if( register_value &  SA5_INTR_PENDING)
 250                 return  1;
 251         return 0 ;
 252 }
 253
 254 /*
 255  *      Returns true if an interrupt is pending..
 256  */
 257 static unsigned long SA5B_intr_pending(ctlr_info_t *h)
 258 {
 259         unsigned long register_value  =
 260                 readl(h->vaddr + SA5_INTR_STATUS);
 261 #ifdef CCISS_DEBUG
 262         printk("cciss: intr_pending %lx\n", register_value);
 263 #endif  /* CCISS_DEBUG */
 264         if( register_value &  SA5B_INTR_PENDING)
 265                 return  1;
 266         return 0 ;
 267 }
 268
 269
 270 static struct access_method SA5_access = {
 271         SA5_submit_command,
 272         SA5_intr_mask,
 273         SA5_fifo_full,
 274         SA5_intr_pending,
 275         SA5_completed,
 276 };
 277
 278 static struct access_method SA5B_access = {
 279         SA5_submit_command,
 280         SA5B_intr_mask,
 281         SA5_fifo_full,
 282         SA5B_intr_pending,
 283         SA5_completed,
 284 };
 285
 286 struct board_type {
 287         __u32   board_id;
 288         char    *product_name;
 289         struct access_method *access;
 290         int nr_cmds; /* Max cmds this kind of ctlr can handle. */
 291 };
 292
 293 #define CCISS_LOCK(i)   (&hba[i]->lock)
 294
 295 #endif /* CCISS_H */
 296